I am using CD and have several questions about the pH of its designated buffers.

1. What is the pH per se of a freshly prepared 10 mM NaH2PO4 water solution ?

2. What is the pH per se of a freshly prepared 10 mM NaH2PO4 , 150 NaF water solution

3. What is the pH per se of the above solutions when Na is replaced by K.

5. What is the pH per se of a 50 mM Tris (no HCl) water solution.

4. Does the phosphate has enough ''strength ' to keep the pH constant over time, say 1-2 weeks ?

5. What is the UV cutoff of a 50 mM Tris (no HCl) water solution.

Thank you.

Valentin

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